| Measured in Inches | ||||||
|---|---|---|---|---|---|---|
| Size Primary Inch |
Basic Major Diameter Inch |
Basic Pitch Diameter Inch |
Minor Diameter, inch | Minor Dia. Area sq. inch |
Tensile Stress Area sq. inch |
|
| External Thread | Internal Thread | |||||
| 2-1/2 | 2.5 | 2.3376 | 2.2023 | 2.2294 | 3.72 | 4 |
| 2-5/8 | 2.625 | 2.4626 | 2.3273 | 2.3544 | 4.16 | 4.45 |
| 2-3/4 | 2.75 | 2.5876 | 2.4523 | 2.4794 | 4.62 | 4.93 |
| 2-7/8 | 2.875 | 2.7126 | 2.5773 | 2.6044 | 5.11 | 5.44 |
| 3 | 3 | 2.8376 | 2.7023 | 2.7294 | 5.62 | 5.97 |
| 3-1/8 | 3.125 | 2.9626 | 2.8273 | 2.8544 | 6.16 | 6.52 |
| 3-1/4 | 3.25 | 3.0876 | 2.9523 | 2.9794 | 6.72 | 7.1 |
| 3-3/8 | 3.375 | 3.2126 | 3.0773 | 3.1044 | 7.31 | 7.7 |
| 3-1/2 | 3.5 | 3.3376 | 3.2023 | 3.2294 | 7.92 | 8.33 |
| 3-5/8 | 3.625 | 3.4626 | 3.3273 | 3.3544 | 8.55 | 9 |
| 3-3/4 | 3.75 | 3.5876 | 3.4523 | 3.4794 | 9.21 | 9.66 |
| 3-7/8 | 3.875 | 3.7126 | 3.5773 | 3.6044 | 9.9 | 10.36 |
| 4 | 4 | 3.8376 | 3.7023 | 3.7294 | 10.61 | 11.08 |
| 4-1/8 | 4.125 | 3.9626 | 3.8273 | 3.8544 | 11.34 | 11.83 |
| 4-3/8 | 4.375 | 4.2126 | 4.0773 | 4.1044 | 12.88 | 13.41 |
| 4-1/2 | 4.5 | 4.3376 | 4.2023 | 4.2294 | 13.69 | 14.23 |
| 4-5/8 | 4.625 | 4.4626 | 4.3273 | 4.3544 | 14.52 | 15.1 |
| 4-3/4 | 4.75 | 4.5876 | 4.4523 | 4.4794 | 15.4 | 15.9 |
| 4-7/8 | 4.875 | 4.7126 | 4.5773 | 4.6044 | 16.3 | 16.8 |
| 5 | 5 | 4.8376 | 4.7023 | 4.7294 | 17.2 | 17.8 |
| 5-1/8 | 5.125 | 4.9626 | 4.8273 | 4.8544 | 18.1 | 18.7 |
| 5-1/4 | 5.25 | 5.0876 | 4.9523 | 4.9794 | 19.1 | 19.7 |
| 5-3/8 | 5.375 | 5.2126 | 5.0773 | 5.1044 | 20 | 20.7 |
| 5-1/2 | 5.5 | 5.3376 | 5.2023 | 5.2294 | 21 | 21.7 |
| 5-5/8 | 5.625 | 5.4626 | 5.3273 | 5.3544 | 22.1 | 22.7 |
| 5-3/4 | 5.75 | 5.5876 | 5.4523 | 5.4794 | 23.1 | 23.8 |
| 5-7/8 | 5.875 | 5.7126 | 5.5773 | 5.6044 | 24.2 | 24.9 |
| 6 | 6 | 5.8376 | 5.7023 | 5.7294 | 25.3 | 26 |
4UN 4UNR Thread Chart
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